/***************************************************************************
 *   Copyright (C) 2007 by Autostop team                                   *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#ifndef GENCRYPTOR_H
#define GENCRYPTOR_H

// Qt
#include <QString>
#include <QByteArray>

// local
#include "blowfish.h"

/// This is symetrical data encryptor/decryptor
class GEncryptor
{
public:
	GEncryptor();
	~GEncryptor();
	
	// algorithm selection
	enum Algorithm								/// Known algoritms
	{
		Blowfish		///< Blowfish
	};
	
	void setAlgorithm( Algorithm ){/*nothing now*/}	/// Sets algoprithm
	Algorithm getAlgorithm() const { return Blowfish; }	/// Gets current algorithm
	
	// key operations
	void setKey( const QByteArray& key );		///< Sets key
	void setKeyFromFile( const QString& path );	///< Loads key from
	
	// encryption / decryption
	
	/// Encrypts bitsream
	QByteArray encrypt( const QByteArray& data );
	/// Decrypts encrypted bitsream
	QByteArray decrypt( const QByteArray& dencrypted );
	
private:

	
	// blowfish 
	
	void blowfishCreateContext( const QByteArray& key );
	
	BlowfishContext	_blowfishContext;
};

#endif // GENCRYPTOR_H

// EOF

